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>Text.ParserCombinators.Parsec.Utils</TITLE
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>MissingH-1.1.0.3: Large utility library</TD
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><A HREF="src/Text-ParserCombinators-Parsec-Utils.html"
>Source code</A
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>Text.ParserCombinators.Parsec.Utils</FONT
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><TD ALIGN="right"
><TABLE CLASS="narrow" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="infohead"
>Portability</TD
><TD CLASS="infoval"
>portable</TD
></TR
><TR
><TD CLASS="infohead"
>Stability</TD
><TD CLASS="infoval"
>provisional</TD
></TR
><TR
><TD CLASS="infohead"
>Maintainer</TD
><TD CLASS="infoval"
>John Goerzen &lt;jgoerzen@complete.org&gt; </TD
></TR
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><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
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><TD CLASS="section4"
><B
>Contents</B
></TD
></TR
><TR
><TD
><DL
><DT
><A HREF="#1"
>Generalized Utilities
</A
></DT
><DT
><A HREF="#2"
>Other Utilities
</A
></DT
></DL
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="section1"
>Description</TD
></TR
><TR
><TD CLASS="doc"
>Written by John Goerzen, jgoerzen@complete.org
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="section1"
>Synopsis</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="decl"
><SPAN CLASS="keyword"
>type</SPAN
> <A HREF="#t%3AGeneralizedToken"
>GeneralizedToken</A
> a = (<A HREF="/usr/share/doc/ghc/html/libraries/parsec-2.1.0.1/Text-ParserCombinators-Parsec-Pos.html#t%3ASourcePos"
>SourcePos</A
>, a)</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><SPAN CLASS="keyword"
>type</SPAN
> <A HREF="#t%3AGeneralizedTokenParser"
>GeneralizedTokenParser</A
> a st b = <A HREF="/usr/share/doc/ghc/html/libraries/parsec-2.1.0.1/Text-ParserCombinators-Parsec-Prim.html#t%3AGenParser"
>GenParser</A
> (<A HREF="Text-ParserCombinators-Parsec-Utils.html#t%3AGeneralizedToken"
>GeneralizedToken</A
> a) st b</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3Atogtok"
>togtok</A
> ::  a -&gt; <A HREF="/usr/share/doc/ghc/html/libraries/parsec-2.1.0.1/Text-ParserCombinators-Parsec-Prim.html#t%3AGenParser"
>GenParser</A
> b st (<A HREF="Text-ParserCombinators-Parsec-Utils.html#t%3AGeneralizedToken"
>GeneralizedToken</A
> a)</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3Atokeng"
>tokeng</A
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow"
>Show</A
> a =&gt; (a -&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Maybe.html#t%3AMaybe"
>Maybe</A
> b) -&gt; <A HREF="Text-ParserCombinators-Parsec-Utils.html#t%3AGeneralizedTokenParser"
>GeneralizedTokenParser</A
> a st b</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3Asatisfyg"
>satisfyg</A
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow"
>Show</A
> a =&gt; (a -&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Bool.html#t%3ABool"
>Bool</A
>) -&gt; <A HREF="Text-ParserCombinators-Parsec-Utils.html#t%3AGeneralizedTokenParser"
>GeneralizedTokenParser</A
> a st a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AoneOfg"
>oneOfg</A
> :: (<A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Eq.html#t%3AEq"
>Eq</A
> a, <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow"
>Show</A
> a) =&gt; [a] -&gt; <A HREF="Text-ParserCombinators-Parsec-Utils.html#t%3AGeneralizedTokenParser"
>GeneralizedTokenParser</A
> a st a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AnoneOfg"
>noneOfg</A
> :: (<A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Eq.html#t%3AEq"
>Eq</A
> a, <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow"
>Show</A
> a) =&gt; [a] -&gt; <A HREF="Text-ParserCombinators-Parsec-Utils.html#t%3AGeneralizedTokenParser"
>GeneralizedTokenParser</A
> a st a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3Aspecificg"
>specificg</A
> :: (<A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Eq.html#t%3AEq"
>Eq</A
> a, <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow"
>Show</A
> a) =&gt; a -&gt; <A HREF="Text-ParserCombinators-Parsec-Utils.html#t%3AGeneralizedTokenParser"
>GeneralizedTokenParser</A
> a st a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3Aallg"
>allg</A
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow"
>Show</A
> a =&gt; <A HREF="Text-ParserCombinators-Parsec-Utils.html#t%3AGeneralizedTokenParser"
>GeneralizedTokenParser</A
> a st [a]</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AnotMatching"
>notMatching</A
> ::  <A HREF="/usr/share/doc/ghc/html/libraries/parsec-2.1.0.1/Text-ParserCombinators-Parsec-Prim.html#t%3AGenParser"
>GenParser</A
> a b c -&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Char.html#t%3AString"
>String</A
> -&gt; <A HREF="/usr/share/doc/ghc/html/libraries/parsec-2.1.0.1/Text-ParserCombinators-Parsec-Prim.html#t%3AGenParser"
>GenParser</A
> a b <A HREF="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t%3A%28%29"
>()</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="section1"
><A NAME="1"
><A NAME="1"
>Generalized Utilities
</A
></A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="doc"
>These functions are generalized versions of
 ones you might see in the Char parser.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><SPAN CLASS="keyword"
>type</SPAN
> <A NAME="t:GeneralizedToken"
><A NAME="t%3AGeneralizedToken"
></A
></A
><B
>GeneralizedToken</B
> a = (<A HREF="/usr/share/doc/ghc/html/libraries/parsec-2.1.0.1/Text-ParserCombinators-Parsec-Pos.html#t%3ASourcePos"
>SourcePos</A
>, a)</TD
><TD CLASS="declbut"
><A HREF="src/Text-ParserCombinators-Parsec-Utils.html#GeneralizedToken"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><SPAN CLASS="keyword"
>type</SPAN
> <A NAME="t:GeneralizedTokenParser"
><A NAME="t%3AGeneralizedTokenParser"
></A
></A
><B
>GeneralizedTokenParser</B
> a st b = <A HREF="/usr/share/doc/ghc/html/libraries/parsec-2.1.0.1/Text-ParserCombinators-Parsec-Prim.html#t%3AGenParser"
>GenParser</A
> (<A HREF="Text-ParserCombinators-Parsec-Utils.html#t%3AGeneralizedToken"
>GeneralizedToken</A
> a) st b</TD
><TD CLASS="declbut"
><A HREF="src/Text-ParserCombinators-Parsec-Utils.html#GeneralizedTokenParser"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:togtok"
><A NAME="v%3Atogtok"
></A
></A
><B
>togtok</B
> ::  a -&gt; <A HREF="/usr/share/doc/ghc/html/libraries/parsec-2.1.0.1/Text-ParserCombinators-Parsec-Prim.html#t%3AGenParser"
>GenParser</A
> b st (<A HREF="Text-ParserCombinators-Parsec-Utils.html#t%3AGeneralizedToken"
>GeneralizedToken</A
> a)</TD
><TD CLASS="declbut"
><A HREF="src/Text-ParserCombinators-Parsec-Utils.html#togtok"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>Generate (return) a <TT
><A HREF="Text-ParserCombinators-Parsec-Utils.html#t%3AGeneralizedToken"
>GeneralizedToken</A
></TT
>. 
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:tokeng"
><A NAME="v%3Atokeng"
></A
></A
><B
>tokeng</B
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow"
>Show</A
> a =&gt; (a -&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Maybe.html#t%3AMaybe"
>Maybe</A
> b) -&gt; <A HREF="Text-ParserCombinators-Parsec-Utils.html#t%3AGeneralizedTokenParser"
>GeneralizedTokenParser</A
> a st b</TD
><TD CLASS="declbut"
><A HREF="src/Text-ParserCombinators-Parsec-Utils.html#tokeng"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>Retrieve the next token from a <TT
><A HREF="Text-ParserCombinators-Parsec-Utils.html#t%3AGeneralizedToken"
>GeneralizedToken</A
></TT
> stream.
   The given function should return the value to use, or Nothing
   to cause an error. 
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:satisfyg"
><A NAME="v%3Asatisfyg"
></A
></A
><B
>satisfyg</B
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow"
>Show</A
> a =&gt; (a -&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Bool.html#t%3ABool"
>Bool</A
>) -&gt; <A HREF="Text-ParserCombinators-Parsec-Utils.html#t%3AGeneralizedTokenParser"
>GeneralizedTokenParser</A
> a st a</TD
><TD CLASS="declbut"
><A HREF="src/Text-ParserCombinators-Parsec-Utils.html#satisfyg"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>A shortcut to <TT
><A HREF="Text-ParserCombinators-Parsec-Utils.html#v%3Atokeng"
>tokeng</A
></TT
>; the test here is just a function that returns
a Bool.  If the result is true; return that value -- otherwise, an error.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:oneOfg"
><A NAME="v%3AoneOfg"
></A
></A
><B
>oneOfg</B
> :: (<A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Eq.html#t%3AEq"
>Eq</A
> a, <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow"
>Show</A
> a) =&gt; [a] -&gt; <A HREF="Text-ParserCombinators-Parsec-Utils.html#t%3AGeneralizedTokenParser"
>GeneralizedTokenParser</A
> a st a</TD
><TD CLASS="declbut"
><A HREF="src/Text-ParserCombinators-Parsec-Utils.html#oneOfg"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>Matches one item in a list and returns it. 
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:noneOfg"
><A NAME="v%3AnoneOfg"
></A
></A
><B
>noneOfg</B
> :: (<A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Eq.html#t%3AEq"
>Eq</A
> a, <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow"
>Show</A
> a) =&gt; [a] -&gt; <A HREF="Text-ParserCombinators-Parsec-Utils.html#t%3AGeneralizedTokenParser"
>GeneralizedTokenParser</A
> a st a</TD
><TD CLASS="declbut"
><A HREF="src/Text-ParserCombinators-Parsec-Utils.html#noneOfg"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>Matches one item not in a list and returns it. 
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:specificg"
><A NAME="v%3Aspecificg"
></A
></A
><B
>specificg</B
> :: (<A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Eq.html#t%3AEq"
>Eq</A
> a, <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow"
>Show</A
> a) =&gt; a -&gt; <A HREF="Text-ParserCombinators-Parsec-Utils.html#t%3AGeneralizedTokenParser"
>GeneralizedTokenParser</A
> a st a</TD
><TD CLASS="declbut"
><A HREF="src/Text-ParserCombinators-Parsec-Utils.html#specificg"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>Matches one specific token and returns it. 
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:allg"
><A NAME="v%3Aallg"
></A
></A
><B
>allg</B
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow"
>Show</A
> a =&gt; <A HREF="Text-ParserCombinators-Parsec-Utils.html#t%3AGeneralizedTokenParser"
>GeneralizedTokenParser</A
> a st [a]</TD
><TD CLASS="declbut"
><A HREF="src/Text-ParserCombinators-Parsec-Utils.html#allg"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>Matches all items and returns them 
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="section1"
><A NAME="2"
><A NAME="2"
>Other Utilities
</A
></A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:notMatching"
><A NAME="v%3AnotMatching"
></A
></A
><B
>notMatching</B
> ::  <A HREF="/usr/share/doc/ghc/html/libraries/parsec-2.1.0.1/Text-ParserCombinators-Parsec-Prim.html#t%3AGenParser"
>GenParser</A
> a b c -&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Char.html#t%3AString"
>String</A
> -&gt; <A HREF="/usr/share/doc/ghc/html/libraries/parsec-2.1.0.1/Text-ParserCombinators-Parsec-Prim.html#t%3AGenParser"
>GenParser</A
> a b <A HREF="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t%3A%28%29"
>()</A
></TD
><TD CLASS="declbut"
><A HREF="src/Text-ParserCombinators-Parsec-Utils.html#notMatching"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>Running <TT
>notMatching p msg</TT
> will try to apply parser p.
If it fails, returns ().  If it succeds, cause a failure and raise
the given error message.  It will not consume input in either case. 
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="botbar"
>Produced by <A HREF="http://www.haskell.org/haddock/"
>Haddock</A
> version 2.6.1</TD
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